Move Rolla TDD University Drive Relocation US 63 Traffic Analysis January 31, 2020 Move Rolla TDD University Drive Intersection Analysis Table of Contents Introduction ..................................................................................................................... 1 Previous Study ................................................................................................................ 2 Methodology .................................................................................................................... 3 Results ............................................................................................................................ 7 Survey Results ...............................................................................................................16 Conclusion .....................................................................................................................21 List of Figures Figure 1: University Drive Intersection Analysis Study Area ..................................................... 1 Figure 2: Single Southbound Lane Roundabout Design Concept ............................................... 5 Figure 3: Dual Southbound Lane Roundabout Design Concept ................................................. 5 Figure 4: Dual NB Left Signalized Intersection Design Concept ................................................. 6 Figure 5: Dual Southbound Lane Roundabout with Pedestrian Hybrid Beacon .........................13 Figure 6: Dual Southbound Lane Roundabout with Pedestrian Hybrid Beacon 95th Percentile Queue Lengths .........................................................................................................................16 List of Tables Table 1: Concept Study Intersection LOS Results ...................................................................... 2 Table 2: University Drive and US 63 Pedestrian Volumes .......................................................... 4 Table 3: Single Southbound Lane Roundabout LOS Results ..................................................... 7 Table 4: Dual Southbound Lane Roundabout LOS Results ........................................................ 8 Table 5: Signalized Intersection LOS Results ............................................................................ 9 Table 6: Single Southbound Lane Roundabout Queue Results in feet ......................................10 Table 7: Dual Southbound Lane Roundabout Queue Results in feet .........................................10 Table 8: Signalized Intersection Queue Results in feet .............................................................11 Table 9: Alternative Signalized Intersection Concept.................................................................12 Table 10: Dual Southbound Lane Roundabout with Pedestrian Hybrid Beacon LOS Results....14 Table 11: Dual Southbound Lane Roundabou with Pedestrian Hybrid Beacon Approach Queue Results ......................................................................................................................................14 Table 12: Dual Southbound Lane Roundabout with Pedestrian Hybrid Beacon Departure Queue Results ......................................................................................................................................15 Table 13: Summary Evaluation Matrix .......................................................................................23 i | P a g e Move Rolla TDD University Drive Intersection Analysis Appendix A - Turning Movement Volumes B - Survey Results This report was prepared for: This report was prepared by: City of Rolla HNTB Corporation Rolla Transportation Development District Board ii | P a g e Move Rolla TDD University Drive Intersection Analysis Introduction The purpose of this report is to present the methodology and results of the traffic analysis related to the University Drive realignment with US 63. The realigned University Drive will connect the existing University Drive near the I-44 interchange to US 63 near the existing 12th Street/Miner Circle intersection. The existing University Drive and US 63 will be removed. The new University Drive and US 63 intersection will improve accessibility to the Missouri University of Science and Technology (MS&T) campus and improve mobility along the US 63 corridor. The intersections included in this analysis are US 63 and University Drive and US 63 and 10th Street, shown below in Figure 1. The US 63 and University Drive intersection was analyzed as both a roundabout and a signal-controlled intersection for the AM and PM peak hours using 2019 and 2040 traffic volumes. Figure 1: University Drive Intersection Analysis Study Area 1 | P a g e Move Rolla TDD University Drive Intersection Analysis The following scenarios were analyzed for AM and PM peak hour traffic analysis: • 2017 Existing • 2040 Future No-Build • 2019 Relocated University Dr o Single Southbound Lane Roundabout o Dual Southbound Lane Roundabout o Signal • 2040 Relocated University Dr o Single Southbound Lane Roundabout o Dual Southbound Lane Roundabout o Signal Previous Study In 2018, a concept study was developed for the City of Rolla as part of the Move Rolla Transportation Development District (TDD) Program to present proposed alternatives for the US 63 corridor that align with the Move Rolla Strategy (2015). As a part of this study, existing and future no-build traffic results were reported. The existing analysis was conducted with volumes collected in 2017 prior to the MO 72 extension project construction. This study contained an updated existing analysis that includes the construction of MO 72 with assumed traffic diversion based on anticipated development in the area. The future no-build results included traffic growth based on the existing plus MO 72 diversion volumes used in the existing analysis plus Westside Development growth. Table 1 below shows the results for the existing University Drive and US 63 and 10th Street and US 63 intersections. Table 1: Concept Study Intersection LOS Results 2017 Existing 2017 Existing + MO 721 2040 No-Build1 AM PM AM PM AM PM Intersection LOS LOS LOS LOS LOS LOS University Dr & US 63 B C B C B D 10th St & US 63 C C C C C E Source: Move Rolla Concept Study (2017) 1 Estimated manually 2 | P a g e Move Rolla TDD University Drive Intersection Analysis In the 2040 No-Build scenario, the 10th Street and US 63 intersection was projected to operate at a Level of Service (LOS) E in the PM peak hour. All other scenarios were projected to operate at a LOS D or better, with no change at either intersection between the 2017 Existing and 2017 Existing + MO 72 diversion scenarios. LOS E is considered acceptable in urban areas by MoDOT. Methodology HNTB used the calibrated VISSIM models from the 2015 Concept Study that were approved by MoDOT as the base for the realigned University Drive analysis. The study area was clipped out of the 2015 Concept Study VISSIM models and modified for the new alignment. The traffic model was updated to accurately reflect new 2019 traffic data. The 2019 model scenarios include traffic volumes from the latest intersection turning movement counts at US 63 and University Drive and US 63 and 10th Street, collected between January and March of 2019, which were used in the Move Rolla TDD Intersection Improvements study submitted in June of 2019. These new counts were taken to gather a more accurate representation of traffic after the construction of the MO 72 extension which opened in September 2018. Additional traffic counts were collected in September of 2019 at US 63 and 12th Street/Miner Circle. The volumes at the US 63 and University Drive intersection were redistributed manually and combined with the University Drive and 12th Street / Minor Circle intersection counts to develop the volumes for the realigned University Drive build alternatives (See Appendix A). The traffic volumes were balanced between University Drive and 10th Street using a right-in-right-out source/sink at 11th St. An origin/destination matrix was then used to determine traffic distribution in the network. Traffic volumes for the 2040 no-build scenario were developed using the same 0.6% annual growth rate used in the Concept study and Intersection Improvements study. Once the 2040 no- build volumes were developed, the same process for balancing and distribution that was performed for the 2019 volumes was applied to the 2040 volumes. 3 | P a g e Move Rolla TDD University Drive Intersection Analysis The signalized intersections include pedestrian crossings at each approach. The pedestrian volumes used at the University Drive and US 63 intersection are shown in Table 2 below. These 2019 pedestrian volumes are the same pedestrians collected at US 63 and 10th Street in 2019. 2040 pedestrian volumes were two times the 2019 pedestrian volumes. Table 2: University Drive and US 63 Pedestrian Volumes AM PM Pedestrian Pedestrian Pedestrian Pedestrian Volume Volume Volume Volume Vehicle Approach (Direction) 20191 20402 20191 20402 Northbound (ClockWise) 1 2 5 10 Northbound (CounterClockWise) 1 2 5 10 Westbound (CW) 0 0 2 4 Westbound (CCW) 0 0 3 6 Southbound (CW) 6 12 5 10 Southbound (CCW) 0 0 12 24 Eastbound (CW) 1 2 3 6 Eastbound (CCW) 0 0 5 10 Total 9 18 40 80 12019 University Drive pedestrian volumes match February 2019 pedestrian counts at US 63 & 10th Street 22040 University Drive pedestrian volumes assumed to be doubled the 2019 volumes Existing signal timings at the US 63 and 10th Street intersection were used in